90770306560 has 40 divisors (see below), whose sum is σ = 217635998976. Its totient is φ = 36308121600.

The previous prime is 90770306551. The next prime is 90770306567. The reversal of 90770306560 is 6560307709.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90770306567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17726016 + ... + 17731135.

Almost surely, 2^90770306560 is an apocalyptic number.

It is an amenable number.

90770306560 is an abundant number, since it is smaller than the sum of its proper divisors (126865692416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90770306560 is an equidigital number, since it uses as much as digits as its factorization.

90770306560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35457174 (or 35457158 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 90770306560 in words is "ninety billion, seven hundred seventy million, three hundred six thousand, five hundred sixty".